<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<table border="1">
    <caption>商品列表</caption>
    <tr>
        <th>商品名</th>
        <th>价格</th>
        <th>库存</th>
    </tr>
</table>


<script>
    //定义一个空的Person()
    function Person(){

    }
    //实例化Person对象
    let p1 = new Person();
    //动态添加属性
    p1.name = "不知火";
    p1.age = 50;
    //动态添加方法
    p1.run = function (){
        console.log(this.name+":"+this.age);
    }
    //调用对象的方法
    p1.run();

    function Car(){
        this.name = "宾利";
        this.price = 500;
        this.run = function (){
            console.log(this.name+":"+this.price);
        }
    }
    let c1 = new Car();
    c1.run();
    //直接实例化空对象的方式
    let p2 = {};
    p2.name = "铃鹿御前";
    p2.age = 66;
    p2.run = function (){
        console.log(this.name+":"+this.age);
    }
    p2.run();
    //直接实例化带属性的方法的对象
    let p3 = {
        name:"紧那罗",
        age :18,
        run:function (){
            console.log(this.name+":"+this.age);
        }
    }
    p3.run();

    //将商品信息封装到一个对象中，在数组里面装多个表示商品信息的对象
    let arr = [{title:"小米",price:"5000",num:40},{title:"华为",price:"9000",num:40},{title:"一加",price:"8000",num:40}]
    let table = document.querySelector("table");
    //遍历数组
    for (let item of arr){
        let tr = document.createElement("tr");
        let titleTd = document.createElement("td");
        let priceTd = document.createElement("td");
        let numTd = document.createElement("td");
        titleTd.innerText = item.title;
        priceTd.innerText = item.price;
        numTd.innerText = item.num;
        tr.append(titleTd,priceTd,numTd);
        table.append(tr);
    }
</script>
</body>
</html>